Class A

test/orm/test_events.py:2209–2213

    @classmethod
    def setup_classes(cls):
        class A(cls.DeclarativeBasic):
            __tablename__ = "a"
            id = Column(Integer, primary_key=True)
            unloaded = deferred(Column(String(50)))
            bs = relationship("B", lazy="joined")

        class B(cls.DeclarativeBasic):
            __tablename__ = "b"